Use the tools & resources collected by Cloudflare Community MVPs in this tool tip to help you implement, use, and troubleshoot Cloudflare.
This is a Cloudflare Community Tip. Community Tips address best practices when configuring Cloudflare, how to fix issues you may see, and tools to use to help you troubleshoot. See all Community Tips.
Welcome to Cloudflare
At Cloudflare, we want to help you build something great. Visit the Welcome Center for a step-by-step walk you through the essential actions you need to take to get started.
After you visit the Welcome Center, return to this tip if you have any questions. We’re excited to see what you build.
Cloudflare Diagnostic Center
Checks: nameservers, DNSSEC, DS record configuration, if connecting to ‘domain.com’ works, if connecting to ‘www.domain.com’ works, & for existing MX records
Browsing Experience Security Check
Cloudflare Security Check
Browser & Browser Plugins
What’s My Browser
Claire, Is Site Using Cloudflare?
Dr.FLARE debug tool for Cloudflare (Chrome Extension)
DNS Non-HTTPS Links
Verisign DNSSEC Analyzer
Learn & Test DMARC
Microsoft Remote Connectivity Analyzer
DMARC Domain Checker
DKIM Core Tools
Google Postmaster Tools
MxToolbox Email Header Analyzer
Mail server test (TLS version, Mail delivery status, SSL certificate output & expiration):
Mail server test - each parameter as needed (click on “More Options” to show them):
Useful generator tools (BIMI, MTA-STS, TLS-RPT, SPF, DKIM, DMARC, FCrDNS check):
Cloudflare Load Balancing
Cloudflare Image Resizing
Read How to use webpagetest.org for page load speed testing
Cloudflare Webpage Speed Test Tool
Critical Path CSS Generator
Think With Google
Cloudflare Connection Speed Test
$ traceroute example.com
$ dig example.com +trace
$ GET https://example.com/cdn-cgi/trace
Search Engine Spider Simulator
Safe Browsing site status
ShotSherpa - your website around the world
Experte Page Speed Test
IP WHOIS Lookup
IP Reputation Investigation
Project Honey Pot
Composite Blocking List
About Classless Inter-Domain Routing
Learning Center - Anycast Network
Help Center - How Cloudflare Works
Helpful On Support Tickets
Helpful Tests, Links and Commands
$ dig @126.96.36.199 ch txt whoami.cloudflare +short
$ dig +short @2606:4700:4700::1111 -6 ch txt whoami.cloudflare
$ curl -svo /dev/null https://example.com/
$ curl -svo /dev/null --resolve example.com:443:188.8.131.52 https://example.com/
$ curl -svo /dev/null --resolve example.com:80:184.108.40.206 http://example.com/
$ curl -svo /dev/null https://example.com --tlsv1.0
$ curl -svo /dev/null https://example.com --tlsv1.1
example.com with your domain &
123. with your origin IP address
Image Resizing is currently available for Pro, Business and Enterprise customers. To begin, ensure you have enabled Image Resizing in the Cloudflare dashboard. Cloudflare Load Balancing runs at each of our data centers across 250 cities worldwide and is powered by our DDoS-resilient DNS to ensure that traffic continues to get routed even under stress. Learn more about Cloudflare Load Balancing.
If You Need More Help
This community of other Cloudflare users may be able to assist you, login to Cloudflare and post your question to the Community. When you post on the Community make sure to include as much of this information as possible: the specific error message you are seeing, the URLs this is happening on, screen shot of the error, and the steps to reproduce the error. Please indicate what troubleshooting steps you’ve tried in order to help us help you.
Expert Comments Appreciated
This Community Tip will remain open for input from Community experts and those familiar with this issue. We really appreciate comments like: “What are the three things to always try” or “Do this first” or “In my experience”.
This is a Cloudflare Community Tip, review other tips here.
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